Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1-23035 ITEM B1 found under Push Button by Boll And Kirch Filterbau Gmbh. The National Stock Number assigned to this part is 5930121954532, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1-23035 ITEM B1.